The black T-shirt men's wear I just bought will have a layer of black Mao Mao in the water. How did it happen?

1. If it is a new vest, don't wash it first, cut the paper and price tag inside, and then put it in the freezer for 24 hours with the original packaging. If it's not new, just wrap it in a plastic bag and put it in the refrigerator.

Take it out after 2.24 hours and don't put it in the bucket immediately. Don't wash the clothes until they are cold.

3, washing is also more particular. Soak in water at about 30℃ and some salt for four hours.

4. After four hours, add water. Then wash clothes with soap powder.

5. After washing, add washing water again to cover the clothes. Soak rice vinegar in water for half an hour, and wring it out to suppress hair loss.

Note: put less rice vinegar, because it will be wrung out after soaking this time, so it will not be cleaned.